Consider the following decay series:
`A to B to C to D`
Where, A,B and C are radioactive elements with half lives of 4,5 sec, 15 days and 1 sec respectively and D is non-radioactive element, Starting with 1 mole of A, the numbe of moles B,C and left after 30 days are:

Options

A. One mole of D and none of A, B or C
B. 3/4 mole of B, 1/4 mole of D and none of A or C
C. 1/4 mol of B, 3/4 mol of D and none of A or C
D. 1/2 moe of B, 1/4 mol of C, 1/4 mol of D and noen of A

Answer

d